Lumped parameter network simulation of a Loop Heat Pipe for energy management systems in full electric vehicles
Lumped parameter network simulation of a Loop Heat Pipe for energy management systems in full electric vehicles
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DOI：
10.1016/j.applthermaleng.2018.06.013
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发表时间：
2018-08-01
影响因子：
6.4
通讯作者：
Marengo, Marco
中科院分区：
文献类型：
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作者：
Bernagozzi, Marco;Charmer, Stene;Marengo, Marco
回路热管（LHP）和其他两相无源热装置，例如热管回路（HPL），代表了用于系统的能量管理的非常有吸引力的解决方案，该系统的特征在于加热和冷却区域的分布式存在以及快速启动、可靠性、低成本和轻便的需求。即使这些设备的通常应用是在航天领域，也可能在汽车工业中有潜在的重要应用，用于开发全电动汽车（FEV）的嵌入式热网络，例如回收废热用于车厢加热和冷却或提高空气动力学效率。在目前的调查中，实施一个新的热控制的电动汽车，包括从热泵（HP）和LHP的可能性，在这里进行评估。更详细地说，一个1-D集总参数模型（LPM），能够预测的瞬态行为的LHP在不同的边界和初始条件的响应，开发和验证对文献的实验数据。提出了一种新的冷凝器数值处理方法，并对三种不同的工质进行了验证。还进行了广泛的参数分析，显示了不同条件下的热解决方案的鲁棒性，并证明了可行性研究和优化的目的，使用建议的数值代码的可能性。利用所提出的模型进行了可行性研究，结果表明，一个阵列的LHP可以有效地传输热量从电机部分的车辆底部，显着减少空气动力学损失。
Loop heat pipes (LHP) and other two-phase passive thermal devices, such as heat pipe loops (HPL), represent a very attractive solution for the energy management of systems characterized by a distributed presence of heating and cooling zones and by the needs of fast start-up, reliability, low cost and lightness. Even if the usual application for these devices is in the space sector, there could be a potential significant application for the automotive industry, for the development of embedded thermal networks for full electric vehicles (FEV), in order for example to recover the waste heat for cabin heating and cooling or to improve the aerodynamic efficiency. In the present investigation, the possibility to implement a new thermal control for an electric vehicle comprising from heat pumps (HP) and LHP, is here evaluated. In more detail, a 1-D lumped parameter model (LPM) that is able to predict the transient behaviour of a LHP in response of varying boundary and initial conditions, is developed and validated against literature experimental data. A novel methodology for treating numerically the condenser is proposed and validated for three different working fluids. An extensive parametric analysis is also conducted, showing the robustness of the thermal solution for different conditions and proving the possibility of using the proposed numerical code both for feasibility studies and for optimization purposes. A feasibility study utilizing the proposed model is also conducted and the results indicate that an array of LHPs can effectively transport heat from the motor section of the vehicle to the underbody, reducing significantly the aerodynamic losses.